Hi Stefan, On 08:11 Thu 30 May , Stefan Wahren wrote: [cut...] > > + clocks { > > + /* The oscillator is the root of the clock tree. */ > > + clk_osc: clk-osc { > > + compatible = "fixed-clock"; > > + #clock-cells = <0>; > > + clock-output-names = "osc"; > > + clock-frequency = <54000000>; > > + }; > > + > > + clk_vpu: clk-vpu { > > + #clock-cells = <0>; > > + compatible = "fixed-clock"; > > + clock-frequency = <750000000>; > > + clock-output-names = "vpu-clock"; > > + }; > Is the VPU clock really fixed or is it just a workaround for minimal > boot support? Unfortunately I don't have enough insight on this due to lack of documentation. I had to take it by faith from downstream dts. Many thanks, Andrea